September 11 Terrorist Attacks, 2001 Terrorism -- 17 Foreign relations -- 10 War on Terrorism, 2001-2009 7 War on terrorism, 2001- 7 Government policy -- 5 Terrorism 5 more ... World politics -- 5 Politics and government -- 4 Globalization 3 Intelligence service -- 3 Political aspects -- 3 Political violence 3 Foreign public opinion 2 Globalization -- 2 History -- 2 Iraq War, 2003-2011 2 Language 2 Military policy 2 National security -- 2 Political aspects 2 Press coverage -- 2 Prevention 2 Psychological aspects 2 Rhetoric -- 2 Security, International 2 Terrorists 2 Aeronautics -- 1 Air travel -- 1 Ambassadors -- 1 less ...